Cutting device for reaping, mowing, and like machines



v. HEJMA May 10,'1927.

CUTTING DEVICE FOR REA-PING, MOWING, AND LIKUMCHINBS Filed April g5,1925 1.1i l: v Y li 4 .1.i I4

Patented May 10, 1927. y

Unis srarss PATENT OFFICE.

voLAv HEJMA, or BRNo, CZECHOSLOVAKIA.

CUTTING :DEVICE FOR REAPING, MOWING, ANDr LIKE `lVIAHIlVIES..

Application filed April `25, 1925, Serial No. 25,864, and inCzechoslovakia February 11, 1924.

The present invention relates to a cutting device for reaping, mowingand like machines of the kind that comprise a series of stationaryfinger pieces operating in conjunction with knives mounted'on an endlesschain;

The object of the invention is to improve upon this kind of device toprovide for a better cutting effect and a more sturdy construction. Y

Referring to the accompanying drawings, Figure l is a plan view of thecutter with the upper rail or bar removed, Figure 2 a verticallongitudinal section on the line X-X Figure 3, and Figure 3 a verticalcross-section on the line Y-Y Figure 2.

In the drawings divided knives a are shown each with siX teeth, whichare provided at bothends with flat attachments a',

a2 bent backwards in a horizontal directionk through a longitudinalslot, into the interior of a casing running horizontally andtransversely through the machine and `formed of two U-shaped supportingarms and c. On the lower support c there are mounted the usual fingerpieces CZ.

The two supports b, 4c are provided internally with longitudinalgrooves, in which an endless chaine is guided with its pins or pivots.The attachments a2 of the dividedy knives are pivotally mounted oncorresponding pins of the endless chain, whilst the attachments a areprovided with pins a3 guided in the groove of the support c. The

' endless chain e is guided at both ends of the casing Z, c lover cogwheels or sprocket wheels rotatable round perpendicular axes, andthrough a second casing fashioned similar to the casing Z9, c, so thatthe knives a always rotate in one and the same direction. In this way amuch larger cutting surface is obtained than with mowing machines theknives of which. are moved to and fro. The pins c3, are identical inevery respect with r the pins on the attachment a2, the only differencebeing that the last mentioned pins have a double function, namelyy asthe pivot of the endless chain and a support for one end of a knifesection, whilethe pin a3, functions merely as the guiding element of theother end of the knife section.

Having now particularly describedy and ascertained the nature of my saidinvention and in what manner the same is `to be' performed, I declarethat what I claim is:

l. A cutting device for reaping, mowing and likeV machines, comprisingin combination a hollow casing having longitudinal grooves in opposedinner walls thereof, stationary finger pieces-fastened to said casing,an endless chain traversing said casing, and

-having pins for slidably guiding the saine in said grooves, and knifesections each articulated at one end to a pin of said endless chain andprovided at the other end with a pin adapted to be guided in saidVgrooves independently of said chain. y

2. A cutting device for reaping, mowing and like machines, comprising incombination a hollow casing, longitudinal grooves formed in the top andbottom inner faces of the cavity in said casing, `stationary finger.pieces fastened to said casing, an endless chain arranged in saidcasing and having pins by means of which it is slidingly guided in .saidgrooves, and lknife sections .each articulatedat one end to a pin ofsaid articulated at one end to a pin of said endless chain and providedat the other end with a pin adapted to be guided in said grooves of saidcasing independently of said chain.

In testimony whereof I have signed my name to this specification.

DR. VCLAV I-IEJMA.

